Clutch.



PATENTED DEC. 27, 1904.

F. A. BROWNELL.

GLUTGH.

APPLIUATION FILED 00T. zo. 1904.

2 SHEETS-SHEET l.

. ou Illlllm r Zfzy.

PATENTED DEC. 27, 1904.`

P. A. BROWNELL.v

CLUTCH.

APPLIOATION FILED 001:20. 1904.

Z SHEETS-SHEET 2.

mud

@witnesses latented December 27, 1904.

PATENT Orrrcn.

FRANK A. BROVNELL, OF ROCHESTER, NEW YORK.

CLUTCH.

SPECIFICATION forming part of Letters Patent No. 778,820, dated December27, 1904.

Original application filed June 10, 1897, Serial No. 640,267. Dividedand this application filed October 2Ol 1904. Serial No. 229,241.

I rtl/Zr whom, it may concern:

Be it known that 1, FRANK A. BRowNnLL, of Rochester, in the county ofMonroe and State of New York, have invented certain new and usefulImprovements in Clutches; and l do hereby declare the following to be afull, clear, and exact description of the same, reference beingl had tothe accompanying drawings, forming a part of this specification, and tothe reference-numerals marked thereon.

My present invention has for its object to provide a clutch fortransmitting' motion from a driving member to a driven member, includingalso means for automatically disconnecting said members and arrestingthe movement of the driven member at a predetermined point.

To these and other ends the invention consists in certain improvementsand combinations of parts, all as will be hereinafter more fullydescribed, the novel features being point-ed out in the claims at theend of the specification.

1n the drawings, Figure 1 is a side elevation of a machine illustratingthe construction and operation of the clutch mechanism embodying myinvention. Fig. 2 is a similar view looking at the rear side of theclutch mechanism. Fig. 8 is a view similar to Fig'. 1, some of the partsbeing shown in section; and Fig. a is an end elevation of the clutchmechanism.

Similar reference-numerals in the several figures indicate similarparts.

A device embodying' my invention is adapted to be used for various formsof machines embodying an intermittently-operated part to which motion istransmitted from a continuously-operated driving member, and in thcpresent illustration l have shown a woodworkingmachine, such as the onedisclosed in a prior application filed by me on the 10th of June, 1897,bearing Serial No. 640,267, of which this case is a division. Themachine itself is one adapted for sawing and grooving small boards orother articles, and it embodies generally a table-top 1, having thereina reciprocating section 2, on which the material to be operated upon iscarried past tools 3 in the form of saws clamped to the shaft 4L,

which is supported in suitable bearings and rotated by a belt or otherdriving connection. In the present instance the material is secured tothe table by a clamping device embodying the vertically-operatedpresser-head 5, operated by a bell-crank lever 6, pivoted to a bracketor support 7 on the movable tablescction and actuated by means of a rodor link 8, .attached to the pivoted arm 9 and also having a slottedconnection with the bracket 7, whereby as the link 8 is drawn forwardlythe head will be first operated into engagement with the work-piece,clamping the latter to the table, when the continued outward movement ofthe link will cause the tablesection to be moved rearwardly to carry thework-piece past the tools or saws 3.

The main shaft or driving member 10 is journaled in one of the sideportions of the main frame of the machine, and its outer end issupported in a bracket 16, inclosing a steppulley 17, adapted to receivethe driving-belt, as will be understood, and between this shaft and thedevices for reciprocating the movable section of the table the clutchmechanism embodying my invention is arranged, whereby the table may beoperated continuously or intermittently, the parts of which are soarranged that when the table is arrested it is in its forward oroutermost position to receive a work-piece.

As stated, the movement of the clamp and table is caused by theoscillation of the lever 9, and while this may be accomplished by anysuitable means I prefer to connect it to a link 18, attached to the endof a slotted lever 19, pivoted at its lower end, as indicated at 20, andconnected with a rotary disk or driven member 21 by a crank-pin 22,secured between the parallel ways 23, whereby it may be adjustedrelatively to the center of the disk to vary the oscillatory movement ofthe lever 19 to produce the desired length of stroke. The disk 21 isjournaled loosely upon the ends of the shaft 10, its outward movementthereon being prevented by means of a head 24. Also mounted upon thedriving shaft or member is keyed a relatively longitudinally movabledisk 25, having its face provided with a covering 80 of leather or othersuitable material, which lOO will form a suitable surface tofrictionally engag'e the proximate face of the disk 21. At

the rear side of the disk 25 projects a hub on which is journaled aloose collar 31, connected to a shifting-lever 32, pivoted to the baseof the machine. This lever is provided with a slot or aperture 33, inwhich is located a cam 34, mounted on a shaft 35, supported in a bearing36 on the frame l5. At one end of the shaft 35 is an arm 37, carrying' apin 38, extending into a slot 39 in a link 40, which is connected at itslower end to a foot-lever 45, attached to a rock-shaft 46, carrying at`its rear end a rock-arm 47, having its end eX- tending loosely througha boss 48 on an adjustable shoe or stop 49, slidably mounted upon a head50, supported upon the shaft 35. The end of this stop or sliding shoe isadapted when projected to cooperate with a stop or projection 51,arrang'ed upon the periphery of the disk 2l, so that when the two stopsare in engagement the disk will be arrested with the parts in theposition shown in full lines in the several figures.

In order to temporarily hold the arm 37 in the operative position, Iprovide the springarm 52, having a point or projection 53 thereon, co'perating with the recess or depression formed in the arm 37 to retainthe latter in the position shown in dotted lines in Figs. 2 and 3, thefriction between these parts being easily overcome, as will beexplained. The treadle or lever 45 is yieldingly supported in its normalposition by a spring 54, and at one side it is provided with a lug orprojection 55, adapted to engage beneath a latch or projection 60 on atreadle G1, which is also supported in its normal position by a spring62,

From the foregoing it will be seen that when the parts are in theposition of rest, as shown in the several figures, with the stops 49 and5l in engagement and the frictiondisks disconnected the operator tostart the machine presses the treadle 45 downwardly to the positionshown in dotted lines in Fig. 3. This movement engages the projection 55beneath the latch 60 and draws the arm 37 downwardlyinto engagement withthe springlingers orv frictional retainer 52. The iirst movement of thetreadle 45 withdraws the stop 49 from beneath the stop5l,and thesubsequent movement of the lever 37 rotates the shaft 35 and the cam 34thereon, causing' the disk 25 to be moved outwardlyT and held withsuflicient frictional engagement against the disk 2l to cause theoperation of the workclamp and the feed-table in the manner heretoforedescribed. Then it is desired to stop the operation of the feedingdevices, the operator by pressing upon the treadle 61 releases thetreadle 45, allowing it to be moved upwardly by the spring 54, when theslight movement of the treadle relative to the lever 37, which ispermitted by the slot 39 in the into its normal position by theshifting-arm 47 without altering the -position of the cam 34, which isretained in operative position by the arm 37 and the friction device 52until the stop 51 engages the stop 49 and rotates the shaft 35 to causea positive disengagement of the driving' and driven members.

A clutch mechanism embodying my invention is simple in construction andoperation, and while it is adapted, as will be understood, for otheruses than those described it is'intended to be employed.particularlywhere it it desired to arrest a mechanism at some particular point ofoperation.

I claim as my inventionl'. The combination with a rotary shaft and adriving clutch member rotating therewith, of a driven clutch member,astop thereon,and a clutch-actuating arm, an independentlymovable stopcontrolled by the clutch-actuating arm and means for projecting saidstop in the path of the stop on the driven member to actuate the arm andcause the automatic disconnection of the members.

2. The combination with a rotary shaft, a driving clutch member rotatingtherewith, and a driven clutch member, of a stop there-A on` aclutch-actuating arm, and devices for retaining the clutch members inengagement, an adjustable stop connected to said arm and operatedindependently thereof and means for projecting said stop in the path ofthe stop on the driven member to positively operate the driving memberout of contact with the driven clutch member.

3. The combination with a rotary shaft and a driving clutch memberrotating' therewith; of a driven clutch member having a stop thereon, anoscillatory shaft havinga cam and connections between the shaft and oneof the clutch members for connecting and disconnecting them, a movablestop connected to the oscillatory shaft and cooperating with the stop onthe driven clutch member to cause the disengagement of the clutchmembers and means for operating the rock-shaft to hold the mowy ablestop out of operative position and to hold the clutch-sections inengagement.

4. The combination with a rotary shaft and a driving clutch memberrotating' therewith, of a driven clutch member, a stop thereon and ashifting-arm for causing' the engagement and. disengagement of theclutch members, a movable stop connected to said arm and adapted to beprojected in the path of the stop on the clutch member, retainingdcvices for holding the shifting-arm when the clutch is engaged, and anactuating-lever having' a loose connection with the shiftingarm and alsowith the movable stop, whereby when moved in one direction the clutchwill be eng'ag'cd and when moved in the other the movable stop will beprojected in the path of the stop on the clutch member.

link 40, allows the stop 49 to be projected i 5. rlhe combination witharotary shaft and IOO IIS

a driving clutch member rotating therewith, ot a driven clutch member, astop thereon and a shifting-arm for causing' the engagement anddisengagement of the clutch members, a movable stop connected to saidarm and adapted to be projected in the path of the stop on the clutchmember, frictional retaining devices for holding the shifting-arm toretain the clutch members in engagement, an actuating-lever having aloose connection with the shitting-arm and also with the movable stop, adevice such as a spring' for automatically operating saidactuating-lever and a catch for holding the lever.

6. The combination with a rotary shaft and a driving clutch memberrotating therewith, of a driven clutch member, the stop thereon and thearm operating the driving clutch member, the cam-shaft actuating' it,the arm on the cam-shaft having the stop movable independently thereonfor engaging' the stop on the clutch member, the treadle having the armloosely engaging the movable stop and the slip connection between thetreadle and the cam-shaft, means for operating the treadle inoncdirection, and a retainer for the treadle. T. rlhe combination with arotary shaft, and a driving clutch member rotating theredevices forretaining the treadle when moved in one direction.

8. The combination with a rotary shaft, and a driving clutch memberrotating therewith, of a driven clutch member having a stop, aclutch-shifting arm and a cam-shaft having two arms thereon, a movablestop on one of said arms, a pivoted treadle and a loose connectionbetween one side of the treadlepivot and the stop, a loose connectionbetween the other side of the treadle-pivot and the other arm on thecam-shaft and a yielding retainer for the cam-shaft, a spring forlactuating the treadle in one direction and a spring-operated catch forengaging and holding the treadle, substantially as described.

FRANK A. BROWTNELL. lllitnesses:

Gr. WILLARD RICH, CLARENCE A. BATEMAN.

